Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bb2fca065162361b0243a0beb20de62d18b866ddf3dd44fbe9839174da34010' 
  AND token = 'OUHV4sU5sy0qyGbthqJ/Qn836OGaZgLWQ8vB8QMh5Lo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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