Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e741837634d407bbde9dc269aa404e2939ba7e586ff45c2d85679e684ad289c3' 
  AND token = 'JSYQiZHanjsasmf7bYF7XJM2kTRYqfZ4m6tfJ3MVpm8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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