Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '848771c2bd2af3400f48124c061e731eeab03b7f512315ee3931b9031a65022e' 
  AND token = 'wps7Uwqkbd3eLioigqzo+gs1Cn5kcDP73tvAB9fHYZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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