Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c7d17e4a1778b0e23e9c089edcbf223976de6b57d350acf707ff2724a3a30c8' 
  AND token = 'BcnddajEtjhztwsp96w6it53UuUtNgmIq7ALbksqXXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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