Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '611e6641ca74f07ccac442d16eb651bc11b629d04fb56ec94913601e4ab216df' 
  AND token = 'WL3OLX6AH91dXBdKsWjG/HzXgMI8/smKJBOUeX455Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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