Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46da4d8cc5f187fe062c7aadd80439363f8a45d04901422c7484668ce52e1c79' 
  AND token = 'HjTZ70Zb0t19w0gp7aMcO+lW36hNXN31EauqtsLAy98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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