Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e6180af94fb1b07185d5c89328794143068256133583f1854a5974528f0caa9' 
  AND token = 'KM7xSpzSAnPgdQU7HTo5yeV5im4TZlusz4xulLY52Js=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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