Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c165e21f3ca5a4058377992f16f5c6c5f0d5a4a578e7593203b75732c7a265e0' 
  AND token = 'oimxAvuFMf1lq0fLq/KvvliXji680Y9cJEcaVzY/Os4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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