Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9ae00284090360f85bce5e8a2ce0007a1a7677bdfc2025eb042f78b31a02470' 
  AND token = '/u83oYTxQDFx1QKDclQXbMza7pbLXMetqJ1I02ONRL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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