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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d2f53e29b875f1639cd074e0eaf92d06b095d34b746e542f89fadb2e310405' 
  AND token = 'RJMRvC0odch1mC6i4x/ukLgkWbP/3zlDGWp5QMHTgO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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