Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '417279c128d4ffe1eb58d7d385736cef6c1304d000604fe215d506eab96bd227' 
  AND token = '0tAhuq07t23uW52S1ix+UvYArROvvlZIY/MtlC/87Nc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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