Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e3c3810a0cdda96358de0fc4e5c0d186a4b9ed45bed65be9974fdb44f9709bb' 
  AND token = 'VVwLY3JPDkPH7a9HaAGrqLtQJOXFSppacQPIc0zgJm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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