Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1fa64d4ec03f25355331e133b82a0e696ee81d676da3070434765354eb85fd7' 
  AND token = 'bRVQdqP9GqH1gxudwieYyCYVH4ljRxMnee0eOO2+jpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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