Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2df03260e6333bc33a33d4edf9d46cc4eb9e0b163eda0a4c8b97032bd195a032' 
  AND token = 'zjYrVJ1hjaVVjJA2ou8DUIPsyv7fYcYTCigHa3BKBQE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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