Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed67a9ac2768f05f7d7303d0a5e51325e199944e20a74da1b2639c063386a3e4' 
  AND token = 'QU3PasE9bZPb9cdaIBWmJ/nEru/VoJkHh57fOwHWn1k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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