Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd48fc85f4c024ec41fca2a38702be4b1de548344efdabbccb2664f121839c338' 
  AND token = 'R2gTO+i/YuO5zRCw4VG6IW9gB1XlCDLgDIelzN5JpX0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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