Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0369c0b45e26c3284759d1bba78264bde4d8fe190d1759727e4b0253ef8e1bf5' 
  AND token = '+9bXg9mEc8VC17oAhi9iVvptzen5NuT0mInI6verUSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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