Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fecfa4bcd714eeedafba8d1d9df30407d20cf844ec11004a1a94b85c4857cd57' 
  AND token = 's0LD2maqaNwVYwyuMXPC8GxNOer53JsoxjFCFGhjnpw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}