Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5effdc84cdc7a25a453aa05c69014300c41a702b607e536b618263e2517c6b6b' 
  AND token = 'iUhMCNkNMB5+oplqe/fALShgaWl3ZLf6T2zZbWYDVIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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