Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75db243475164648f72c55c8968c1c46efc02ab2ddc32a22443ded2983f1dede' 
  AND token = 'F4EqtKOJSB2W8A93R5Jdzf9atBk7LrHfjaKTPvsVaPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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