Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e459c86082961a3dc9325107428724cb7d30cb11194bc16d0d352ae3840e23e' 
  AND token = 'TTjF1FBAjL/UTT66XK4QY4FpFGy8FhRnXTCGufkne5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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