Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20553db374517cff3a644accefb054c0d3cc80fe060ef012231ecf4bd67018b6' 
  AND token = '+o+nTmCT7sqV7ayVMV+1SmhSzKlP4eZCr4qEBV2Lvt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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