Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4f34930465493f4c60a65af77ec68da11fc64f4da8ec25e4ece92f4a5384031' 
  AND token = 'dwLfk6Thk4G4486Y4mh652OpQdhjitElP22ROiURWxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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