Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c18c61271e3f94ebeee05687a555730fe6490f64afc95829ea270105e4801e9c' 
  AND token = 'Was09u7v0hswlqQZXkHdEs8e+C65XSvLo9H11WRboa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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