Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b995d90e715e940c767bd36ff55b5e174128f7f6d2b1137b76e8c8701030cf2' 
  AND token = 'OAXGoLUE6PnB+Mp1jA0qAeKjYRt7btIWdruC1cufYT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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