Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd2d8aaf0829564d1b1d4043b52b17e06b9ea9b5e209342e6f06946505b99e03' 
  AND token = 'P6bu1480B7aJBNdxeCxmL+BPAOeAZPGblFyMs8BogLg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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