Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3781037389a9178047eb606a13a4a4f2afa2362d0cf9128e5d04e303696a614a' 
  AND token = 'dJbseC2L7rPI1BaLxBm5VbH84XPKSvjX6hw6wZlQPtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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