Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eeded6381ab3de4f0fc54ff862b026dfd01fb16d4c75a2897dcd00374a14f8e' 
  AND token = 'JTa9ePI5B0Ye7wTmbI17sF89UZEMwEnEvG5Rqk6bX/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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