Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6c7e605336b16dc800437d95f62ef7b19cc2d3ecd1cec955430fb3e1938c7ed' 
  AND token = 'o+eLzyR2NWW+hlM+CXs59RCL11y23oi6qklEKKZV0M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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