Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4789a129dbd275d70aa86ea480ff16a5b930f3634204f745a4c0f8608a9e0c92' 
  AND token = 'CfJDfurTXO66pCJP+N4hHesRgGb2shOetqoTU27ceQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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