Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd66ce3ffe8876dda2d47e0bab85ee544ec7ba40024d03fe680ef5d2288f4c4e8' 
  AND token = 'P0dLk1j9pCp409lxEXeHT+Ggie9pvTnAubesBhC7bsE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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