SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6579c66914c8b5874d921a9941dc55832fecac4839a5b8bd1ba379df16d82755' 
  AND token = 'VDVthAuv/pwndbwxqOVQNS6ByHK8/WJLXaktvDWlM40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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