Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '784973f56318d220badb2b0e7a251eb38f8de0b2415861ce40be97bd855d96da' 
  AND token = 'U5RE+xWQWrt6WWQQ4Z6/cSuErzaaxxtTNCk6J4uebKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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