Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ea23d53c0680e2a57b22a7164fb10e90a2575d65aa84a7e688e2d4400e7ed61' 
  AND token = '1rVRQnVTEt2dSMa3xD4DGVAz80dysh1Wz+iPXFf5L5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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