Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeb66791cfc8002c88071fa1da38a0df36126d8c2765e5589d1533a4f7d37e2d' 
  AND token = 'cqnT4RXWsN+h8WWkGp2uz6BQ8fLAdGP9l+Rqy1Pc9Uc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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