SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa149bfbc236c0453ea74d08fc83c1fa57ca447862a04813751898f5da26b9d5' 
  AND token = 'gJ3VCrqo1O1s/pzAPr2JZONGqA2SCNjtXmmc6VVicXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00107

JSON explain

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