Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea9975a85d2f0f247336953e462f369ba24d21554188dbb8ec0cb695ac27d723' 
  AND token = 'JNQqrLqxhMucDM5gONN5JHkl02PnYCQtrKfJABuFgkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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