Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39c07e4ac690714e47e6a6c31d5b5fbb26ff2b4ed786bb9a9bfaf410878519e4' 
  AND token = 'JBTxpm1qBhL4bjehfyEYgydnQFI4IGtHAdKXd2ZSKXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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