Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '912e41504a90d600fb0d9fc2fbf441b461d26fe286874af64d9466add6f8c3b5' 
  AND token = 'btdOpCfoAIVXq2Xh54pLbSYShPbzVq6PP7crMEyTkjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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