Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5ad1e4cc689e3555a12623a89363d37fd2fed2162df1abb139720f0ceac83f0' 
  AND token = 'yw+2t9Wyy3zGDzmrdK8RAVVWEfV39JoJOucYHfjblec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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