Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5c6a90ddf84c7975eb15b272b6c41fb002467274c118c0de5aec6cf2c564fc5' 
  AND token = 'X8OUG+fcXHFTBe1lRk4kPzy8Q8Ln0Lc+IEv3ZApsOiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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