Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf36ef9ad445287945d0f21ebc469548b75f1514fa5fabeaefcbe6182e12cd4a' 
  AND token = '9PGLw7HDBkHHBEjaaQHRphSWvKfCcQXB0QeIKKnzFOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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