Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9226835525eb134f6879a6757662ed0b2d50aa2033c9fc3af4f96c4f215354c2' 
  AND token = 'kujYckCUQ3I2Z0ExEk4iKFuyBfuar9lK1WZ6iWuDeYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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