SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e38707af6f4f13e692d09d5398f4a9cc4d7e70b731765988c6a5a684ab64a2c7' 
  AND token = 'SWglhFwmSB0T/p+62JZaxpvmq1CE+svNI2yaLPK1xDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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