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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005dca6166ab69337ec5a536e14bb647a9c0e1fb374268dab88dd8804ea23a90' 
  AND token = 'A0pBkuKhJWbZLt0aRwj/hp9vysWeaAoiLq85wNn0T4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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