Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '564c52e6d6ead0e0fec549c9ae477a56ea1d7d144b1573302a7fc328fa122dc1' 
  AND token = 'lgv+Dtw1nJ/UvpOrVMigU+7NDysB7hhJzSaLh3TIiSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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