Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6d752ead7498f225219de42628d8575984fc99fbe316ec0574e3fe722fccae0' 
  AND token = 'ePk2v0vVtoZpHZH8YV6wdp37oKLIGeJIHiJk7ieCdus=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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