Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '449fd081597e94f66692bfb8a00ef74bf8659c944310e2c1c2e22b0c5f0b9f39' 
  AND token = '5o5tfyNfKUW/LD115YMdZdcPXgnO+S3Kc8Ew8BZPUC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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