Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59d6c98860be7a078a6a71c9c7f17c07aa367edbee76698798365ab086bc2937' 
  AND token = 'aKpDr/Wba/ehmj6bpLRRjSliO+t0d/xWZhroIfsaU9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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