SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bfd3f89695b38142a191c17e990e5b543c1bfab991b0b82d1b7931dd915f124' 
  AND token = '+GLVgLhRlkYQWk5/oE6NMHwBeOGTVgtgqY2qxR7QP8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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