Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '085af6f56db6897eda12524fa2f4d5a62b87627fe0ea510366be4ef07c0f0b25' 
  AND token = 'PRGL1V2U7uHBeSokGTeXND1Mj9LwxpxkjunUI2jarmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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