Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fdde663d005e4fa00c5afeb0494d43173a7aa1964750248ce4f768e48f7bc7a' 
  AND token = 'NWRxPSxi/JAkF5O7icexJUaJiZIOQtgjivE6MOry5Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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