Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c713b27aa0aeda7a254bfc1d403efd368d41becf160e52f2e897a3809ad79355' 
  AND token = 'upK3Xd4ooWeRpj4kK2PbcLJg6tngD9pNBnftJe5PaaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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