Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37fd766a14b27850f000e0281b5c9e0199e10382bd8e6bbc97c28c79d514987d' 
  AND token = '+6Xkyx4zS39ZNkr/Y93CWcpyS0ua45Lfnf2IyYCiqiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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