Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '31fef0580a16ab48822e750b90aef4cbcdd6129f052b8d1b083b1e285a5cedb8' 
  AND token = '42vNMmWMIDANdfMcXkctGVgW+FKTRjU3U5x0hv26+28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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