Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b335e6e6ae156166124a49e9cb98b94d4ef70baa44c5223a6a605c8c8dbd87f2' 
  AND token = '30OwViRFMvcILYW4a5dxDfUJNErlNOmUiFcFyujI3Rg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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