Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56a9b075de6b5382bb58077cd5acee0ce3ca8ba0e727f530b53836514c395388' 
  AND token = '/0M1fUNCEgADpAtn1W/Kcr+D5C8RHDiDyE8njBY3EI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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