Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b960bf41888ba57d2dd87a56c0d8aef60c8c865b6bb33adadc5fe8a1c242e612' 
  AND token = 'IHA1GTu+UtzTlj/Lw9W+hVj++cTsdw8t7so+76xccyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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