Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a91eb9a6b4c77b976a148518a5a0038e149690e2113c3f7329b3c8a7c2139ed7' 
  AND token = 'chT6tAhj6RSBBjly+60Wph2M+H4m+RMGI2Rustjel04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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