Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a9ae6df3ecdef21e99ded12abe8dcf4f0d60fdac84c9e77bb227e1f9d22ea1c' 
  AND token = 'vHaoNQC0b/fIHsL+lGgbgbrgKtMWIqERXO4igkf4m+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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