SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8a25073d8b5528e1747799525ffaef861595248218747c0de3ba80e8d0f3ba9' 
  AND token = 'mnjwSxOmTJ4kl+PXD4DhQB/lY6/68joCLNK9tVd4EfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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