Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ac286998dc37d7138fa1ebbb4c7e301babc25178ca4ca937f6d51dbec89ffc0' 
  AND token = 'AKMgFklCLdqk8GeXSW/sYtiFMFpHqPI+vsMo7BDqdCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}