SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8788d7aaa6d8b7931c967422f34906869915b828d4309461030a9a0dd29f0817' 
  AND token = 'gzTHMe6jGAtfcA1sf/kBkehQY1UJjXTJTK8b+iw5zB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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