Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '535a412ccca16c2c35f7f7bfb410ebe8df5491ebbde1d71cf2ac3c1df6e646d9' 
  AND token = 'IjaR5mFodtZsECCp5aQjRBKE3xhZkmRdjNRqMCmizFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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