Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bda17b70f1b05afab8f24832d7f7565e4e7c3f1404c559ea8c3aa0a5068e992' 
  AND token = 'TJAFlo4a+bGK+n5XcKWgzAsa8d3cmlQ2qkLJhUwqu9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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