Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '914279e92db2e4c944b1031cdb876c9f8a9a1c05baa864dd242dff084e78706f' 
  AND token = 'KjmrPNZKMp58UKb0zSInPdiPbg7vRxtz998gsRE1784=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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