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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b219010bdfcd672e0971ac6d3264fef749c2beae0ac3500fec77e2d8c74cecaf' 
  AND token = '8Z7MwI1mw5zqvjEP4t1aDxwe6vwW/5D1AL/Mx9BoBVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}