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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd82695a7bf7205305fcb44965d37ab0a5e68a3f8a327023b55ea32303f927d8f' 
  AND token = 'CYZX/662WVn3yNgg5rXs5NJkVWIv97Wiyq4l3yEzoUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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