Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a3152f6c62a7a251c70d6253a45bcf3d120c22b25fa3f0510ec34d23418d653' 
  AND token = 'gTNAcNm0RcAhCENsuvvE7x23lxJW2M+7/WAtJHh1WUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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