Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c09816f64c1a842dd1b88d7a0cf7274710379a91a029c984544a49a24ed68e56' 
  AND token = 'YU6F2FBgUmEPGDzwj75kaCjz+AcbpAtPC/TsNMNKDW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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