Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe559d1459a54cd0396fb8250043205fd7653bd14ee1d393d70ff2300e3810b9' 
  AND token = 'wf3UHcwCO8BpiS6crhUjUBwlU0Etd48pv4ekPhN/FRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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