Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '474d4bcab2facc2aa9aeca5b4b5f0386ce981c49b1fb5d6849f1f59b42f3e04f' 
  AND token = '2yrs9+3DJvPwdUF+Q/ecvqBnABdBe/nd9LCzFwwd+GE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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