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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce465050705c553e9cfa8891cc6dc6919177590ddce00cc85da4786398dbfd92' 
  AND token = 'krcQW5NJ/h+fIPAIp6lbVOWlAESYXa9HtJiV4Idb/g0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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