SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '414d99ceed1074b3af212f82eb5c3c94798b6def32eb893635adf6ed26707c22' 
  AND token = 'wD1JuKRhSn/ESBuJFBwpG9aSCIZtQ/A2hr5/TetoE1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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