Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41efc0b0c28a8edd1c2f3194ffcd8523bb8a17e254427731e36bf5dcbe6b35bb' 
  AND token = '7cRJOuagYKhD2blyIpf0rfchijSxGiuZv3VRCMdUP+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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