Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d2c51746788a4f52807286697ee2e9c55381245f5ed5b8375e13581d2204e20' 
  AND token = 'CJDWxITLBpNOtpzkGM0dXUo9kYutYEUzAFChBph+06c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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