Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afd5ae4505ad20aa06bde76c1d249802d3ea32e44b83159ad7f5f1e37f0d02d5' 
  AND token = 'sfdcnpltKIqFMNgbNT8dDRDKe76rOeQmrYJtKV8zRWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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