Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9ada7725ae417535bc36482eef36c1cbb878bec6863a79cff87f6b80327a8e0' 
  AND token = 'YlG+hhen0N1RSiFqzP3NEqbLGk2WLfpaSem/lVK0Ij8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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