Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0376103015323493ca69e9788c9f9591c7a5f3069b81c94bb43f50c2b9b9ec20' 
  AND token = '3OqurXxJZveO5KJDvfFwLEGfCnJtp2qZsJxDcSQb/iw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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