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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '862d1427764b56898d82a488c3db86da65b8c60b62da94a203eb127ad02c6fde' 
  AND token = 'IJJb9UiEOHd9nVqU+42GCiR1Age/4/tjKhgaccZSgH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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