Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64ef830e6c5f88ecf6ad57c8eb5bbbe48f427fe1f7a94c30f91ba1c8463548df' 
  AND token = 'ggTP9YzdPIoxRzjE0fVhAs5B7UzL4kw7zMroyk7vVvk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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