SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1cd45ad41e6a31d9e6826d61928618b18b1b7f4c698611bcd01d511f94815f85' 
  AND token = 'p9Z9/+POIQhzB5YHhPHMKseFDqroJ/zYgZ/VVCQ6UDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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