Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38e643f512ff1f1a42302c33125b0a1ed303495279dfb862b4e6ef8e515f2113' 
  AND token = 'h5lbB/T603RJszmJSbud0CE8HV/m/E0pi3mzJ0qxHT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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