Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9f5d445a0b887498588cf02d87dfc4eb6843c812306145fd96e8fa8b9e1d5ac' 
  AND token = 'NEhYpGIM7cceGF5n12KqlEBOQhAeuSKhIQgMY/qJCKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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