Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8ebf65ca380795780866500ea765163a9d8394dbdab4f684f15fa17127936673' 
  AND token = 'CoZyq5qRIvj1u1HlFDpXCDFajWmeP19RVwNcRuh6eVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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