Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c83d6be151fea22e943b99e427119dd6032f94eea60720736c0e5d6b3a78c7f5' 
  AND token = 'JGAQ3cLquDBhltOgoaro6DIDiNqKqUcXViKxlxtarsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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