Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50a3da0d652739f8d78da71878579ffbe0aa3735877f0cec9c784076e6b267d7' 
  AND token = 'dSBwZowPtOSXlbIGDofxZS6rZkyjVPFPAI/MHOkhtS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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