SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '914bfc2e344340290ac32b6396445f08e3471ce6498a8939616d25c2d0ed1a48' 
  AND token = 'ULcTGcUwCK0RbzB//Yj5d6Hxd/OSZ6mk+kM//MNRCPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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