Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1d33d3c8e2986e8668dd7bafb61bba84da3bcc3e5f014156782e2988fa17cbe' 
  AND token = 'wsEgNCujKJFT7oKNNZjMOjYERbbxrPGbRs0cPYbmIyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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