Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20e79f681a40a2f87acf798e9831f9a64073df1c8d00f8ad698c6c693784b012' 
  AND token = '9O9B/Gu+q0v/snMAEYGknFEGfVAdn8yfBQOhJE4p1Pk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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