Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd3c43e0919f5694a7e6169e5fa96c19bf436236c02e14ed940d7b22a9aa9d4c' 
  AND token = 'pESJ8UQB43nN5cvM445N3U8kqMYY6v7FM7vI4LnfvZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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