Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e59f1ec119470ba65652e13329ea7e70e06eb3bcf43212be5c9741acb21d78d1' 
  AND token = 'jgtuzuuIEBKQcjT1vtxycmiSVfFj4CZ/oIn90w/J+oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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