SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ba57a5b44f054effca47f2c7735564756763109cf3c2e2e3f6c8556dcb312f4' 
  AND token = 'MF/BI+KGgdAX+KapXuAI8rGqhdBPNSyIvijYrpBY/vE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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