Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e434d4e7e3768bc4457602bee6ade65f75509828ef5b0152c7b5a635f4e2c58' 
  AND token = 'EhqLZgNBZ7AF0eo3yIeulbx92rX50rky3wi5zVkz5i8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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