Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59d109cab6969949f5019750d69911f5b3644d0c6201978a705c68759e728de0' 
  AND token = 'WAgVo0Jur/TiRQufqZw3vnD6CSB4e5eu1XxzfS7FSRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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