Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40130e735980ddb86ba3d51437a59172cdadc462621afcc6ddcadaed4428e2de' 
  AND token = 'aGGcxr94wkZroY2I/Pwy9z3uJRENZA5FENc+eGQaDGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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