Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '941d0e92e3784b8e1ff5ee7477bf957ae255a38196222b4d5a0c1eb1ec9c3aaf' 
  AND token = 'ibdyKxvm4iWkCjiiaIxVC+zOsWQr7Ti64tePIZxLNXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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