Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5abde20ef64fc4e15da8e195a8db4443e10737d7a48e93056797ce31a09611ea' 
  AND token = 'nmg6SnYACx6XLOcviXn6lf0TAIgD7sR62gZKY2QM7+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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